230 lines
7.4 KiB
C
230 lines
7.4 KiB
C
/* Target definitions for PowerPC running Darwin (Mac OS X).
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Copyright (C) 1997, 2000, 2001 Free Software Foundation, Inc.
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Contributed by Apple Computer Inc.
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This file is part of GNU CC.
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GNU CC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU CC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#undef TARGET_VERSION
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#define TARGET_VERSION fprintf (stderr, " (Darwin/PowerPC)");
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/* The "Darwin ABI" is mostly like AIX, but with some key differences. */
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#define DEFAULT_ABI ABI_DARWIN
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/* The object file format is Mach-O. */
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#define TARGET_OBJECT_FORMAT OBJECT_MACHO
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/* We're not ever going to do TOCs. */
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#define TARGET_TOC 0
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#define TARGET_NO_TOC 1
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/* The Darwin ABI always includes AltiVec, can't be (validly) turned
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off. */
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#define SUBTARGET_OVERRIDE_OPTIONS \
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rs6000_altivec_abi = 1;
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#define CPP_PREDEFINES "-D__ppc__ -D__POWERPC__ -D__NATURAL_ALIGNMENT__ -D__MACH__ -D__BIG_ENDIAN__ -D__APPLE__"
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/* We want -fPIC by default, unless we're using -static to compile for
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the kernel or some such. */
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#define CC1_SPEC "%{!static:-fPIC}"
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/* Make both r2 and r3 available for allocation. */
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#define FIXED_R2 0
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#define FIXED_R13 0
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/* Base register for access to local variables of the function. */
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#undef FRAME_POINTER_REGNUM
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#define FRAME_POINTER_REGNUM 30
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#undef PIC_OFFSET_TABLE_REGNUM
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#define PIC_OFFSET_TABLE_REGNUM 31
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/* Pad the outgoing args area to 16 bytes instead of the usual 8. */
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#undef STARTING_FRAME_OFFSET
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#define STARTING_FRAME_OFFSET \
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(RS6000_ALIGN (current_function_outgoing_args_size, 16) \
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+ RS6000_VARARGS_AREA \
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+ RS6000_SAVE_AREA)
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#undef STACK_DYNAMIC_OFFSET
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#define STACK_DYNAMIC_OFFSET(FUNDECL) \
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(RS6000_ALIGN (current_function_outgoing_args_size, 16) \
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+ (STACK_POINTER_OFFSET))
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/* Define cutoff for using external functions to save floating point.
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Currently on Darwin, always use inline stores. */
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#undef FP_SAVE_INLINE
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#define FP_SAVE_INLINE(FIRST_REG) ((FIRST_REG) < 64)
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/* Always use the "debug" register names, they're what the assembler
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wants to see. */
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#undef REGISTER_NAMES
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#define REGISTER_NAMES DEBUG_REGISTER_NAMES
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/* This outputs NAME to FILE. */
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#undef RS6000_OUTPUT_BASENAME
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#define RS6000_OUTPUT_BASENAME(FILE, NAME) \
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assemble_name (FILE, NAME);
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/* Output before instructions. */
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/* This is how to output the definition of a user-level label named NAME,
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such as the label on a static function or variable NAME. */
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#define ASM_OUTPUT_LABEL(FILE,NAME) \
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do { assemble_name (FILE, NAME); fputs (":\n", FILE); } while (0)
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/* This is how to output a command to make the user-level label named NAME
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defined for reference from other files. */
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#undef ASM_GLOBALIZE_LABEL
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#define ASM_GLOBALIZE_LABEL(FILE,NAME) \
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do { fputs ("\t.globl ", FILE); \
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RS6000_OUTPUT_BASENAME (FILE, NAME); putc ('\n', FILE);} while (0)
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/* This is how to output an internal label prefix. rs6000.c uses this
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when generating traceback tables. */
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/* Not really used for Darwin? */
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#undef ASM_OUTPUT_INTERNAL_LABEL_PREFIX
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#define ASM_OUTPUT_INTERNAL_LABEL_PREFIX(FILE,PREFIX) \
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fprintf (FILE, "%s", PREFIX)
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#undef TEXT_SECTION_ASM_OP
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#define TEXT_SECTION_ASM_OP ".text"
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/* Output before writable data. */
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#undef DATA_SECTION_ASM_OP
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#define DATA_SECTION_ASM_OP ".data"
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/* This says how to output an assembler line to define a global common
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symbol. */
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/* ? */
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#undef ASM_OUTPUT_ALIGNED_COMMON
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#define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \
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do { fputs (".comm ", (FILE)); \
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RS6000_OUTPUT_BASENAME ((FILE), (NAME)); \
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fprintf ((FILE), ",%d\n", (SIZE)); } while (0)
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#define ASM_OUTPUT_SKIP(FILE,SIZE) \
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fprintf (FILE, "\t.space %d\n", SIZE)
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/* Override the standard rs6000 definition. */
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#undef ASM_COMMENT_START
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#define ASM_COMMENT_START ";"
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/* FP save and restore routines. */
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#define SAVE_FP_PREFIX "._savef"
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#define SAVE_FP_SUFFIX ""
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#define RESTORE_FP_PREFIX "._restf"
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#define RESTORE_FP_SUFFIX ""
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/* Generate insns to call the profiler. */
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#define PROFILE_HOOK(LABEL) output_profile_hook (LABEL)
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/* Function name to call to do profiling. */
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#define RS6000_MCOUNT "*mcount"
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/* Default processor: a G4. */
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#undef PROCESSOR_DEFAULT
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#define PROCESSOR_DEFAULT PROCESSOR_PPC7400
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/* Default target flag settings. Despite the fact that STMW/LMW
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serializes, it's still a big codesize win to use them. Use FSEL by
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default as well. */
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#undef TARGET_DEFAULT
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#define TARGET_DEFAULT (MASK_POWERPC | MASK_MULTIPLE | MASK_NEW_MNEMONICS \
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| MASK_PPC_GFXOPT)
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/* Since Darwin doesn't do TOCs, stub this out. */
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#define ASM_OUTPUT_SPECIAL_POOL_ENTRY_P(X, MODE) 0
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/* Unlike most other PowerPC targets, chars are signed, for
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consistency with other Darwin architectures. */
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#undef DEFAULT_SIGNED_CHAR
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#define DEFAULT_SIGNED_CHAR (1)
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/* Given an rtx X being reloaded into a reg required to be
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in class CLASS, return the class of reg to actually use.
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In general this is just CLASS; but on some machines
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in some cases it is preferable to use a more restrictive class.
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On the RS/6000, we have to return NO_REGS when we want to reload a
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floating-point CONST_DOUBLE to force it to be copied to memory.
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Don't allow R0 when loading the address of, or otherwise furtling with,
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a SYMBOL_REF. */
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#undef PREFERRED_RELOAD_CLASS
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#define PREFERRED_RELOAD_CLASS(X,CLASS) \
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(((GET_CODE (X) == CONST_DOUBLE \
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&& GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT) \
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? NO_REGS \
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: (GET_MODE_CLASS (GET_MODE (X)) == MODE_INT \
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&& (CLASS) == NON_SPECIAL_REGS) \
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? GENERAL_REGS \
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: (GET_CODE (X) == SYMBOL_REF || GET_CODE (X) == HIGH) \
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? BASE_REGS \
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: (CLASS)))
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/* Fix for emit_group_load (): force large constants to be pushed via regs. */
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#define ALWAYS_PUSH_CONSTS_USING_REGS_P 1
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/* Darwin word-aligns FP doubles but doubleword-aligns 64-bit ints. */
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#define ADJUST_FIELD_ALIGN(FIELD, COMPUTED) \
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(TYPE_MODE (TREE_CODE (TREE_TYPE (FIELD)) == ARRAY_TYPE \
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? get_inner_array_type (FIELD) \
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: TREE_TYPE (FIELD)) == DFmode \
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? MIN ((COMPUTED), 32) : (COMPUTED))
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/* Darwin increases natural record alignment to doubleword if the first
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field is an FP double while the FP fields remain word aligned. */
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#define ROUND_TYPE_ALIGN(STRUCT, COMPUTED, SPECIFIED) \
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((TREE_CODE (STRUCT) == RECORD_TYPE \
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|| TREE_CODE (STRUCT) == UNION_TYPE \
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|| TREE_CODE (STRUCT) == QUAL_UNION_TYPE) \
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&& TYPE_FIELDS (STRUCT) != 0 \
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&& DECL_MODE (TYPE_FIELDS (STRUCT)) == DFmode \
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? MAX (MAX ((COMPUTED), (SPECIFIED)), 64) \
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: MAX ((COMPUTED), (SPECIFIED)))
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/* XXX: Darwin supports neither .quad, or .llong, but it also doesn't
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support 64 bit powerpc either, so this just keeps things happy. */
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#define DOUBLE_INT_ASM_OP "\t.quad\t"
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/* Get HOST_WIDE_INT and CONST_INT to be 32 bits, for compile time
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space/speed. */
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#undef MAX_LONG_TYPE_SIZE
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#define MAX_LONG_TYPE_SIZE 32
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